	# limithash.pl
	#!/usr/bin/perl
	use warnings;
	use strict;
	
	use Limit::Hash;
	
	tie my %hash, 'Limit::Hash', 'this', 'that', 'other';
	
	$hash{'this'} = 'this is ok';
	$hash{'that'} = 'as is this';
	print $hash{'this'}, "\n";
	$hash{'invalid?key'} = 'but this croaks';
